Use a dull knife to gently scrape off any excess foundation lingering on your item.
Dampen stain and rub with bar soap. Massage it between your fingers until it begins to lift. Rinse well and repeat as needed.
If the stain is gone, feel free to dry according to the label. If it remains, soak in a sink with a dissolved Oxi Boost pod for 1-3 hours, then wash again.